Joe Rogan Urges The Rock to Come Clean About Steroids. 'He's Been Lying.'

Joe Rogan is on a mission to expose celebrities he believes are secretly taking steroids.

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The popular podcast host and UFC commentator, whose net worth is estimated to be $120 million, took to the airwaves this week to take aim at his latest target, Dwayne "The Rock" Johnson.

"There's no way you can look like that in your 40s," Rogan said about The Rock who turned 50 in May. "The Rock should come clean right now."

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The Rock is currently starring in DC'sBlack Adam. He's admitted to using steroids in his early teens but says he's now clean.

A necessary evil?

The topic came up while Rogan was discussing Liver King, a $100 million fitness celebrity recentlyouted as a steroid user,despite his frequent denials. Rogan also believes Chris Hemsworth and Hugh Jackman have taken steroids for their superhero roles.

Related: From Liver King to Liar King: An Organ-Eating Fitness Guru Exposes His Steroid Use in a Shocking YouTube Apology

A fitness enthusiast, Rogan admitted that he uses hormone replacement therapy, a steroid-free form of testosterone.

"I don't think there's anything wrong with taking hormone replacement. I think it's actually wise. "I think it's healthier," he said.

He urged celebrities like The Rock to come clean about steroids if they use them.

"There's a responsibility that you have to people that are listening to you. And I think you have to be honest," he said.

But he also conceded that he understood the pressure that was on movie stars to not talk about drug use.

"The massive amount of money that's involved in a film, like the one thing they don't want is to jeopardize any of the potential income," he said. "And if you come out and say, you know, the only way I got this way for the Hulk is I had to take massive amounts of steroids, people are gonna get upset."

For Johnson, who received$22.5 million to make Black Adam, according to Variety, that might be an expensive confession.

Watch the full video here.